Rheem 491 Owner's Manual And Installation Instructions page 22

SAVE A SERVICE CALL

Water heater size
Do you have the correct size water heater for your requirements?
The sizing guide in the Rheem sales literature and on the Rheem website
(www.rheem.co.nz) suggests average sizes that may be needed.
TEMPERATURE PRESSURE RELIEF VALVE RUNNING

Normal Operation
It is normal and desirable that this valve
allows a small quantity of water to escape
during the heating cycle. However, if it
discharges more than a bucket full of water
in 24 hours, there may be another problem.

Continuous dribble
Try gently raising the easing lever on the
relief valve for a few seconds (refer to
"Temperature Pressure Relief Valve" on
page 16). This may dislodge a small particle
of foreign matter and clear the fault. Release
the lever gently.

Steady flows for long period (often at
night)
This may indicate the mains water pressure
sometimes rises
pressure of the water heater. Ask your
installing plumber to fit a pressure limiting
valve.
Warning: Never replace the relief valve with one of a higher pressure
rating.

Heavy flows of hot water until water heater is cold - then stops until
water reheats
The water heater must be switched off at the switchboard. Phone Rheem
Service or their nearest Rheem Service Centre to arrange for an inspection.
above the designed
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